Sheet-metal sleeve.



T. E. MURRAY.

SHEET METAL SLEEVE.

APPLICATION FILED DEC.I4.1916.

1,267,250. Patented May 21,1918.

I a W i fl B E I' 3" 15 w w g If ia/ i Fyji fiq 3 THOMAS E. MURRAY, 01NEW YORK, N. Y.

SHEETMETAL SLEEVE.

Specification of Letters Patent.

Patented May 21, 1918.

Application filed December 14, 1916. Serial No. moles.

To all whom it may concern:

lie it known that I, THOMA8 E. MURRAY, a citizen of the United States,residing at New York. in the county of New York and State of New York,have invented a certain new and useful Improvement in Sheet-MetalSleeves, of which the following is a specification.

The invention is a sleeve of sheet metal having an internal screwthread, and pro duced wholly by stamping or striking up suitable blanksand uniting the parts by an electrically welded joint.

In the accompanying drawings- Figure 1 shows in perspecti e the two halfsections which, when united hereinafter described, form a coupling slcee. I 2 is a longitudinal section of said Sleeve, showing two tubes inplace therein. Fig. 3 is a similar section of a, sleeve. hovin an internal rib, to which the inserted in: is buttelded- Similar P r Fromsimila-rsheet metal blanks of suitablo dimensions I produce by stampingor stnikin org, two precisely simileghalf sections o emi'cylmdricalform, each section hem internally threaded. The

threads run to by the same tion. Where the s eeve is to be used as acoupling, I strike up two threads, as (L D, to receive respectively thetubes E, F to be connected. l.

The sections A, B being placed with their longitudinal edgsin contact, Iunite'said edges by an electrically welded joint, indicatcd at a. Figs.2 and 3. The screw threads on one-half section then register, with thescrew threads on the other half section. The tubes E. F are externallygage with the threads C, D, Fig. 2. Their inner abut-ting ends may bechamfered oi; The terminals G, current may be connected respectively tobe formed and the Plates bent letters of reference indicate like strikinup or starnpmg operathreaded to en H of a source of welding said tubesto produce a. welded joint between said abutting ends.

Whe e the sleeve is to be used as a. socket, reinforcin ring or the likeon the end of a tube, I nufive each half section with asingle thread Iand an internal rib or shoulder J Fig. 3. The threaded tube E then bearsatits end against saiclshoulder. The terminals (i. li from the source ofwelding current in this case 'are connected to tube E and the sleeve,and an electrically welded joint is produced between the butt and of thetube and the rib J.

As the sections A, B are interchangeable, it will of course. be obviousthat they can be made in die presses in large quantities, and that anytwo units may be put together to form the sleiivc: also that the unitingis effected by a single electrically welded joint, which is producedpractically instantaneously. I The sleeve thus madeis very much cheaperand at the same time stronger than the sleeves or couplings of castmetal in common use.

I claim:

1. A sleeve, comprising two longitudi nally divided half sections andhaving an internal screw thread and an internal shoulder. eachsection,together with the portion of the screw thread and shoulderthereon beingstruck up from a metal plate, the screw threads and shoulder on onesection registering with the screw threads and shoulder on the othersection, and the said sections bein electrically welded together attheir longitudinal edges.

2. A; sleeve as in claim 1 in combination with a. tube engaging saidscrew thread and electrically welded to said shoulder.

In testimony whereof I have afiixed my signature in presence of twowitnesses.

V THOMAS 'Ff: MURRAY. Wit i i ERTRUDE T. Pox-rm,

MAY T. MGGARRY.

